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[ China Instrumentation Network Instrument Development ] Recently, the research team led by Zhang Weijun at Anguang Institute has made significant progress in the study of aerosol spectral characteristics. Their latest work introduces a three-wavelength cavity-enhanced albedometer designed to measure wavelength-dependent optical properties and single-scattering behavior. The findings were published in *Optics Express*, an esteemed journal of the Optical Society of America (OSA).
Aerosol spectral properties are closely tied to their chemical composition, size distribution, and mixing state, which help identify the type and origin of aerosols. However, traditional measurement systems often rely on single-wavelength and single-parameter methods, making it challenging to conduct real-time, simultaneous measurements of multiple optical parameters. As a result, systems capable of measuring aerosol spectral characteristics remain rare.
In 2014, researchers Zhao Weixiong and Dr. Xu Xuezhe pioneered the integration of broadband cavity-enhanced absorption spectroscopy with an integrating sphere technology, developing the world’s first cavity-enhanced albedo spectrometer. This system enabled the online in situ measurement of extinction, scattering, and absorption coefficients of atmospheric aerosols, as well as the single-scattering albedo. The research was published in *Atmospheric Measurement Techniques* (7(8), 2551–2566, 2014).
More recently, the team expanded the detection range of the system into the ultraviolet-red spectrum, creating a wide-band cavity-enhanced albedo spectroscopy system capable of measuring various optical parameters across different wavelengths. This advancement was detailed in *Optics Express* (26(25), 33484–33500, 2018) and has since been applied in comprehensive atmospheric observations across key regions such as the Beijing-Tianjin-Hebei, Yangtze River Delta, and Pearl River Delta. The system has demonstrated strong potential for both scientific research and practical applications, receiving high recognition from domestic and international experts.
The results have been further published in top-tier geoscience journals, including *Atmospheric Chemistry and Physics* (16(10), 6421–6439, 2016; 18(23), 16829–16844, 2018).
This groundbreaking research was supported by the National Natural Science Foundation of China, the Anhui Outstanding Youth Science Fund, and the Chinese Academy of Sciences Youth Innovation Promotion Association.
(Original title: Anguang's new progress in the detection of aerosol spectral properties)